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FS: fix crash overreading data on flash0

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noticed while using intrafont with some homebrew code.
when using musl libc's hardened malloc, the overread in the
code caused PPSSPP to segfault.
This commit is contained in:
rofl0r
2024-02-26 17:17:33 +00:00
parent 3d58d1ff30
commit 55ae3b1c3e
1 changed files with 3 additions and 0 deletions
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Core/FileSystems/DirectoryFileSystem.cpp
+3
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@@ -1067,6 +1067,9 @@ size_t VFSFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size, int &usec) {
EntryMap::iterator iter = entries.find(handle);
if (iter != entries.end())
{
if(iter->second.seekPos + size > iter->second.size)
size = iter->second.size - iter->second.seekPos;
if(size < 0) size = 0;
size_t bytesRead = size;
memcpy(pointer, iter->second.fileData + iter->second.seekPos, size);
iter->second.seekPos += size;